DmC: Devil May Cry walkthrough/SM05

Copper: Simple Eradication is the fifth Secret Mission in. In this, must defeat all 10 Lesser Stygian using only Angelic weapons Aquila and Osiris within 80 seconds.

It is recommended to use the Aquila to gather the enemies and the switch to Osiris. There must be a continuous attack using Osiris to activate its Feed passive ability, thereby increasing damage.